ArticleJournal of experimental orthopaedics2021
Assessment of paradoxical anterior translation in a CR total knee prosthesis coupling dynamic RSA and FE techniques.
Article in Journal of experimental orthopaedics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- The Coronal Plane Alignment of the Knee Classification May be Unreliable With Advanced Knee Arthritis.Arthroplasty today · 2026Article
- Customized positioning of the glenoid component in reverse shoulder arthroplasty: a new computer aided design methodology.International orthopaedics · 2026Article
- Variations in bone mineral density after joint replacement: A systematic review examining different anatomical regions, fixation techniques and implant design.Journal of experimental orthopaedics · 2025Review
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Authors and funding
6 authors.
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Abstract
purposeThe study aims were to assess the kinematic data, Internal-External (IE) rotation, and Antero-Posterior (AP) translation of the contact points between the femoral condyles and polyethylene insert and to develop a combined dynamic RSA-FE (Radiostereometric - Finite Element) model that gives results congruent with the literature.
methodsA cohort of 15 patients who underwent cemented cruciate-retaining highly congruent mobile-bearing total knee arthroplasty were analyzed during a sit-to-stand motor task. The kinematical data from Dynamic RSA were used as input for a patient-specific FE model to calculate condylar contact points between the femoral component and polyethylene insert.
resultsThe femoral component showed an overall range about 4 mm of AP translation during the whole motor task, and the majority of the movement was after 40° of flexion. Concerning the IE rotation, the femoral component started from an externally rotate position (- 6.7 ± 10°) at 80° of flexion and performed an internal rotation during the entire motor task. The overall range of the IE rotation was 8.2°.
conclusionsDuring the sit to stand, a slight anterior translation from 40° to 0° of flexion of the femoral component with respect to polyethylene insert, which could represent a paradoxical anterior translation. Despite a paradoxical anterior femoral translation was detected, the implants were found to be stable. Dynamic RSA and FE combined technique could provide information about prosthetic component's stress and strain distribution and the influence of the different designs during the movement.
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